| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.449 | 0.837 | 0.770 | 4.920 |
| Arsenic | As (ppm) | 7.080 | 2.160 | 3.480 | 15.646 |
| Calcium | Ca (wt%) | 0.597 | 0.300 | 0.056 | 2.082 |
| Copper | Cu (ppm) | 8.999 | 1.475 | 5.222 | 14.838 |
| Iron | Fe (wt%) | 1.779 | 0.608 | 0.954 | 4.331 |
| Mercury | Hg (ppm) | 0.031 | 0.014 | 0.011 | 0.082 |
| Magnesium | Mg (wt%) | 0.348 | 0.178 | 0.060 | 1.153 |
| Manganese | Mn (ppm) | 494.257 | 148.403 | 237.550 | 854.210 |
| Sodium | Na (wt%) | 0.061 | 0.010 | 0.028 | 0.093 |
| Phosphorus | P (wt%) | 0.017 | 0.002 | 0.011 | 0.023 |
| Lead | Pb (ppm) | 25.233 | 6.394 | 9.974 | 43.074 |
| Selenium | Se (ppm) | 0.260 | 0.112 | 0.108 | 0.893 |
| Titanium | Ti (wt%) | 0.146 | 0.040 | 0.048 | 0.285 |
| Zinc | Zn (ppm) | 34.703 | 19.628 | 14.599 | 140.064 |